#include <fstream>
using namespace std;
ifstream in("sortaret.in");
ofstream out("sortaret.out");
const int N=10001;
const int M=100001;
int a[N][N];
int n,m, v[N];
void citire()
{
  in >> n >> m;
  for(int i=1;i<=m;i++)
  {
    int x,y;
    in >> x >> y;
    a[x][y] = 1;
  }
}
void  afisare()
{
  for(int i=1;i<=n;i++)
  {
    for(int j=1;j<=n;j++)
        out << a[i][j] << " ";
    out << "\n";
  }
}
void dfs(int i)
{
  out<<i<<" ";
  for(int j=1;j<=n;j++)
    {
      if(a[i][j]&&!v[j])
        {
          v[j]=1;
          dfs(j);
        }
    }
  //if(v[i] == 0)
  //{
  //out << i;
  //v[i] = 1;
  //}

}
int main()
{

  citire();
  for(int i=1;i<=n;i++)
  {
    if(!v[i])
      dfs(i);

  }
  return 0;
}